Am I overreacting? My boyfriend still financially takes care of his ex wife.

So for some back story, I’m dating a man that has one child w his ex. He’s been a family friend for over a decade. I’ve known his child since they were born and we’ve always had a good bond. He divorced their mom almost 7 years ago.

Here’s the problem I’m having, he’s financially supported her this entire time, even through her remarrying/divorcing again/dating new people. He doesn’t pay child support as they share 50/50 custody. However, he paid her house off, bought her a new car, and just paid off her school tuition. He says it’s all for “the sake of their child.” He already buys any and everything their child may want/need. I’ve know his ex since he got w her and always thought she was manipulative and vindictive prior to their divorce and me dating him. I completely understand him providing for his kid, but is it not overkill to still provide for the woman you divorced 7 years ago? She recently got a DUI and asked him to pay for her lawyer? We’ve talked about having kids of our own and building a life we want, but now I’m concerned he’s going to put taking care of his ex over that. I love him and want the future we’ve been planning. I completely understand coming 2nd to his kid, but should I also come second to the ex wife? He said it’s “completely normal,” to still take care of her, but I feel like she’s using him. Am I overreacting?